I hear lots of discussion about the confusion of using the "North Up" setting ...

This is important to slow trollers with HB units because (at present with the AS GR16 and AS GR50) the HB chart spins at speeds below 0.6mph...therefore slow trollers are using the "North Up" setting but getting confused of how to use it to their advantage....

The HB default chart orientation is always "North Up" when the antenna sees no movement...so when the boat slows to below 0.6mph...the boat icon icon changes to the "donut" (indicating no movement) ...therefore the chart default orients to "North Up''...

For example...:

Taking a "Course Up" setting of the boat traveling south..."South" is at the top of the screen as long as the boat is moving more than 0.5mph...

Now, if the boat slows to below 0.6mph....2 things happen...:
1. boat icon changes to "donut"
2. chart spins to the default with "North" at the top of the screen....

The "North Up" setting keeps the chart from spinning.... but confusion arises on "which way do I go to get to that blue dot waypoint icon on the chart"......

It is entirely possible to mark the edge of the glass screen..(mentally, stickers, marker...etc.)...:

"North" is at the top of the screen
"East" is at the right of the screen
"South" is at the bottom of the screen
"West" is at the left of the screen

Now, lets say you're staring at your "Donut" on the screen and the blue dot waypoint icon (that you want to go toward) is between the "donut" and the left side of the screen...

The boat has to navigate toward the left of the screen....left side of the screen is "West" ...therefore the boat has to navigate "West" on the Earth to get to the blue dot waypoint...

In a nutshell....(using the "North Up" setting in a HB unit)...

Relative to where your boat icon is on the screen....if you want to navigate...:

*toward the top of the screen........move your boat "North" on the water
*toward the right of the screen......move your boat "East" on the water
*toward the bottom of the screen...move your boat "South" on the water
*toward the left of the screen........move your boat "West" on the water

Rickie